CN116916693A

CN116916693A - Light emitting device, display device, photoelectric conversion device, electronic device, and moving object

Info

Publication number: CN116916693A
Application number: CN202310407288.3A
Authority: CN
Inventors: 佐野博晃; 松田阳次郎; 石津谷幸司
Original assignee: Canon Inc
Current assignee: Canon Inc
Priority date: 2022-04-20
Filing date: 2023-04-17
Publication date: 2023-10-20

Abstract

Provided are a light emitting device, a display device, a photoelectric conversion device, an electronic device, and a moving body. The light emitting device has a subpixel including a first subpixel, a second subpixel, and a third subpixel. One of the first, second and third sub-pixels is adjacent to the other two sub-pixels. Each subpixel includes: the organic light emitting device includes a lower electrode, a bank including an opening exposing a central portion of the lower electrode, an organic compound layer disposed to cover the lower electrode and the bank and including a light emitting layer, and an upper electrode disposed on the organic compound layer. The bank of the first sub-pixel includes a first separation structure at least partially surrounding an opening disposed on the lower electrode of the first sub-pixel. The banks of the third sub-pixel do not include a separation structure configured to surround the openings of the third sub-pixel.

Description

Light emitting device, display device, photoelectric conversion device, electronic device, and moving object

Technical Field

The invention relates to a light emitting device, a display device, a photoelectric conversion device, an electronic device, and a moving body.

Background

The organic light emitting element is a light emitting device as follows: which includes a first electrode, a second electrode, and an organic compound layer disposed between the first electrode and the second electrode, and emits light when carriers are injected from the first electrode and the second electrode into the organic compound layer. The organic light emitting element is a light-weight device that can be flexible. In order to realize a high-resolution display device including an organic light emitting element, a method using an organic light emitting element configured to emit white light and a color filter (hereinafter referred to as a white+cf method) is known. In the white+cf method, an organic layer is formed over the entire substrate. Therefore, it is possible to obtain higher resolution using the pixel size and the pixel pitch relatively easily, as compared with a method of forming organic layers of various colors using a metal mask.

In a display device having a structure in which an organic compound layer is shared by a plurality of organic light-emitting elements, electric charges supplied from a first electrode of one organic light-emitting element are sometimes supplied to an adjacent organic light-emitting element via the organic compound layer. This phenomenon can be observed as leakage current between the organic light emitting elements. Various studies have been actively conducted in order to reduce leakage current.

Japanese patent application laid-open No. 2012-216338 describes a display device including a plurality of first electrodes provided on a plurality of organic EL elements, respectively, an insulating film provided between the plurality of first electrodes, an organic layer provided on the plurality of first electrodes and the insulating film, and a second electrode provided on the organic layer. The organic layer and the second electrode are provided so as to be shared by a plurality of organic EL elements (a plurality of first electrodes). The insulating film includes a trench at a position between the plurality of organic EL elements. The organic layer includes a hole injection layer or a hole transport layer and a light emitting layer. The thickness of the hole injection layer or the hole transport layer is smaller inside the trench than outside the trench. According to japanese patent application laid-open No. 2012-216338, this configuration can suppress leakage of the driving current between adjacent organic EL elements.

In the configuration described in japanese patent application laid-open No. 2012-216338, since the trench is formed at all positions between adjacent organic EL elements (sub-pixels), the light emitting area is small. If the light emitting area is small, it is necessary to increase the current density to obtain a desired luminance, which may shorten the light emitting life of the organic light emitting element.

Disclosure of Invention

The present invention provides a technique that is advantageous in suppressing the area reduction of a light emitting region while suppressing the leakage current between sub-pixels.

A first aspect of the present invention provides a light emitting device including a plurality of sub-pixels including a first sub-pixel, a second sub-pixel, and a third sub-pixel, one of the first sub-pixel, the second sub-pixel, and the third sub-pixel being adjacent to the other two sub-pixels, wherein the plurality of sub-pixels each include: a lower electrode; a bank including an opening exposing a central portion of the lower electrode; an organic compound layer configured to cover the lower electrode and the bank and including a light emitting layer; and an upper electrode disposed on the organic compound layer; the bank of the first sub-pixel includes a first partition structure at least partially surrounding the opening disposed on the lower electrode of the first sub-pixel, and the bank of the third sub-pixel does not include a partition structure configured to surround the opening of the third sub-pixel.

A second aspect of the invention provides a display apparatus comprising a light emitting device as defined in the first aspect.

A third aspect of the present invention provides a photoelectric conversion apparatus including an optical unit including: a plurality of lenses; an image sensor configured to receive light that has passed through the optical unit; and a display unit configured to display an image captured by the image sensor, wherein the display unit comprises the light emitting device as defined in the first aspect.

A fourth aspect of the present invention provides an electronic device, comprising: a display unit comprising a light emitting device as defined in the first aspect; a housing provided with the display unit; and a communication unit provided in the housing and configured to perform communication with the outside.

A fifth aspect of the present invention provides a lighting device, comprising: a light source comprising a light emitting device as defined in the first aspect; and a light diffusing unit or an optical film configured to transmit light generated by the light source.

A sixth aspect of the present invention provides a mobile body, comprising: a lighting fixture comprising a light emitting device as defined in the first aspect; and a main body provided with the lighting fixture.

Other features of the present invention will become apparent from the following description of exemplary embodiments with reference to the accompanying drawings.

Drawings

Fig. 1 is a sectional view exemplarily showing the construction of a light emitting apparatus according to a first embodiment and a second embodiment;

fig. 2 is a plan view showing a configuration example of a first sub-pixel, a second sub-pixel, and a third sub-pixel in the light emitting device according to the first embodiment;

fig. 3 is a schematic cross-sectional view showing the vicinity of the trench shown in fig. 1 in an enlarged state;

fig. 4 is a plan view showing a first modification of the first embodiment;

fig. 5 is a plan view showing a second modification of the first embodiment;

fig. 6 is a plan view showing a third modification of the first embodiment;

fig. 7 is a plan view showing a fourth modification of the first embodiment;

fig. 8 is a sectional view showing the configuration of a light emitting device according to a comparative example;

fig. 9 is a plan view showing the configuration of a light emitting device according to a comparative example;

Fig. 10 is a plan view showing a configuration example of a first sub-pixel, a second sub-pixel, and a third sub-pixel in the light emitting device according to the second embodiment;

fig. 11 is a plan view showing a first modification of the second embodiment;

fig. 12 is a plan view showing a second modification of the second embodiment;

fig. 13 is a plan view showing a third modification of the second embodiment;

fig. 14 is a plan view showing a fourth modification of the second embodiment;

fig. 15 is a sectional view exemplarily showing a configuration of a light emitting apparatus according to a third embodiment;

fig. 16 is a sectional view exemplarily showing a configuration of a light emitting apparatus according to a fourth embodiment;

fig. 17 is a sectional view exemplarily showing a configuration of a light emitting device according to a modification of the fourth embodiment;

fig. 18 is a plan view showing a configuration example of a first sub-pixel, a second sub-pixel, and a third sub-pixel in a configuration example of a light emitting device according to the fifth embodiment;

fig. 19 is a plan view showing a configuration example of a first subpixel, a second subpixel, and a third subpixel in another configuration example of a light emitting device according to the fifth embodiment;

fig. 20 is a diagram showing still another embodiment;

Fig. 21A and 21B are diagrams showing still another embodiment;

fig. 22A and 22B are diagrams showing still another embodiment;

fig. 23A and 23B are diagrams showing still another embodiment;

fig. 24A and 24B are diagrams showing still another embodiment;

fig. 25 is a plan view showing a fifth modification of the first embodiment; and

fig. 26 is a plan view showing a sixth modification of the first embodiment.

Detailed Description

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. Note that the following embodiments are not intended to limit the scope of the claimed invention. In the embodiments, a plurality of features are described, but the present invention is not limited to all of these features, and a plurality of these features may be appropriately combined. In addition, in the drawings, the same or similar structures are given the same reference numerals, and repetitive description thereof will be omitted.

First embodiment

Fig. 1 is a sectional view showing a configuration example of a first sub-pixel 100, a second sub-pixel 200, and a third sub-pixel 300 of a light emitting device 1 according to the first embodiment. The light emitting device 1 includes a plurality of sub-pixels (organic light emitting elements), and the plurality of sub-pixels includes a first sub-pixel 100, a second sub-pixel 200, and a third sub-pixel 300. The first, second and third sub-pixels 100, 200 and 300 are configured such that one sub-pixel of the first, second and third sub-pixels 100, 200 and 300 is adjacent to the other two sub-pixels. The light emitting device 1 may include a plurality of lower electrodes 102, an insulating layer 106, a functional layer (organic compound layer) 103 including a light emitting layer, an upper electrode 104, and a protective layer 105 on a substrate 101.

The insulating layer 106 may include an opening OP exposing a central portion (of the upper surface) of each lower electrode 102. From other perspectives, the insulating layer 106 may be configured to cover the peripheral portion (of the upper surface) of the lower electrode 102, but not the central portion (i.e., the portion inside the peripheral portion). The insulating layer 106 is also called a pixel separation film or bank (bank). The insulating layer 106 may be configured to have a plurality of banks. The plurality of banks may be arranged to be separated from each other or may be connected to each other. The insulating layer (bank) 106 may include trenches 107 serving as a partition structure. The trench 107 may be provided on, for example, the lower electrode 102, but may be provided on a region surrounding the lower electrode 102. The insulating layer 106 may be disposed not only in contact with the peripheral portion of the upper surface of the lower electrode 102 but also in contact with the side surface of the lower electrode 102. The functional layer 103 may be in contact with a portion (i.e., a central portion) of the upper surface of the lower electrode 102 that is not covered by the insulating layer 106. The region where the lower electrode 102 contacts the functional layer 103 is a light-emitting region 108, and when an electric field is applied between the lower electrode 102 and the upper electrode 104, the light-emitting region 108 emits light. The functional layer 103 may be configured to be shared by a plurality of sub-pixels. The charges supplied from the lower electrode 102 may be supplied to adjacent sub-pixels via the functional layer 103.

Fig. 2 is a plan view showing a configuration example of the first sub-pixel 100, the second sub-pixel 200, and the third sub-pixel 300 in the light emitting device 1 shown in fig. 1. The first, second and third sub-pixels 100, 200 and 300 are sub-pixels generating light of different wavelength bands from each other. One of the first, second and third sub-pixels 100, 200 and 300 is adjacent to the other two sub-pixels. From other points of view, in the example shown in fig. 2, the first sub-pixel 100, the second sub-pixel 200, and the third sub-pixel 300 may be configured to be adjacent to each other.

The insulating layer (bank) 106 of the first sub-pixel 100 may include a trench 107a, the trench 107a being configured to at least partially surround the light emitting region 108 or the opening OP of the first sub-pixel 100. In the example shown in fig. 2, the trench 107a is configured to surround the entire circumference of the light emitting region 108 or the opening OP of the first subpixel 100. The insulating layer (bank) 106 of the second sub-pixel 200 may include a trench 107b, the trench 107b being configured to at least partially surround the light emitting region 108 or the opening OP of the second sub-pixel 200. In the example shown in fig. 2, the groove 107b is configured to surround the entire circumference of the light emitting region 108 or the opening OP of the second subpixel 200. Hereinafter, when the trench 107a and the trench 107b are described without distinguishing the trench 107a and the trench 107b, the trench 107a and the trench 107b are described as the trench 107. The pattern in which the trench 107 at least partially surrounds the opening OP may include the following configurations: for example, an inner angle formed by two line segments connecting the center of the opening OP and both ends of the groove 107 is 180 ° or more. For example, if the groove 107 has a circular shape, the pattern may include a configuration in which the groove 107 has at least a semi-circular shape. If the trench 107 surrounding one sub-pixel is divided, the pattern may include the following configuration: an inner angle of each trench 107 formed by a line segment connecting the center of the opening OP and both ends of the trench 107 is obtained, and a sum of the inner angles of the trenches 107 is 180 ° or more.

The insulating layer (bank) 106 of the third sub-pixel 300 does not include a partition structure configured to surround the opening OP of the third sub-pixel 300. Alternatively, the insulating layer 106 of the third sub-pixel 300 does not include a partition structure configured to surround the third sub-pixel 300 between the opening OP of the third sub-pixel 300 and the other sub-pixels 100 and 200 configured to be adjacent to the third sub-pixel 300 and surround the third sub-pixel 300.

Fig. 3 is a schematic cross-sectional view showing the vicinity of the trench 107 shown in fig. 1 in an enlarged state. A lower electrode 102, an insulating layer 106, a functional layer 103, an upper electrode 104, and a protective layer 105 are disposed on the substrate 101. The trench 107 is disposed in the insulating layer 106. From other perspectives, the trench 107 is disposed below the functional layer 103. The functional layer 103 is shared by a plurality of sub-pixels or organic light emitting elements. The functional layer 103 may include, for example, a hole injection layer 103a, a hole transport layer 103b, a light emitting layer 103c, and an electron transport layer 103d.

The thickness T2 of the functional layer 103 on the side wall of the trench 107 of the insulating layer 106 is smaller than the thickness T1 of the functional layer 103 on the flat portion of the insulating layer 106 having a flat upper surface. The hole injection layer 103a and the hole transport layer 103b have relatively high conductivity. However, when the thickness T2 of the functional layer 103 on the side wall of the trench 107 is reduced, the resistance of the hole injection layer 103a and the hole transport layer 103b can be made high. As a result, when the trench 107 is provided, leakage current between adjacent sub-pixels (organic light emitting elements) is suppressed, and color mixing between sub-pixels having emission colors different from each other is suppressed. For example, the leakage current (color mixture) between the first sub-pixel 100 and the third sub-pixel 300 is suppressed by the trench 107a, and the leakage current (color mixture) between the second sub-pixel 200 and the third sub-pixel 300 is suppressed by the trench 107 b. In addition, leakage current (color mixing) between the first subpixel 100 and the second subpixel 200 is suppressed by the trench 107a and the trench 107 b. Since the two trenches 107a and 107b exist between the first subpixel 100 and the second subpixel 200, leakage current (color mixing) between the first subpixel 100 and the second subpixel 200 is effectively suppressed.

The light emitting region 108 may have, for example, a circular shape, but may also have other shapes such as a polygonal shape or the like. Similarly, the groove 107 may have, for example, a circular shape, but may also have other shapes such as a polygonal shape or the like. The light emitting region 108 and the trench 107 may have similar shapes to each other, but may also be different. Instead of the trench 107, a separation structure may be realized by a convex structure or an electrode. A predetermined voltage may be applied to the electrodes.

The trench 107 and the light emitting region 108 are not connected. This is because if the trench 107 and the light emitting region 108 are connected, light emission also occurs on the trench 107 or inside the trench 107, and the light emission becomes uneven as a whole.

Fig. 4 to 6 show three modifications of the first embodiment. In the modification shown in fig. 4 to 6, the groove 107a partially surrounds the light emitting region inside thereof, and the groove 107b partially surrounds the light emitting region inside thereof. In these modifications, the leakage current between the sub-pixels is also suppressed.

Fig. 25 shows another modification. In another modification shown in fig. 25, the groove 107a is arranged to surround the entire circumference of the light emitting region 108 (opening) of the first sub-pixel 100. The second sub-pixel 200 and the third sub-pixel 300 do not include a partition structure configured to surround the light emitting region 108 (opening). Fig. 26 shows yet another modification. In still another modification shown in fig. 26, the grooves 107b are arranged to surround the entire circumference of the light emitting region 108 (opening) of the second sub-pixel 200. The first sub-pixel 100 and the third sub-pixel 300 do not include a partition structure configured to surround the light emitting region 108 (opening). Even in this form, leakage current between the sub-pixels is suppressed.

Fig. 7 shows still another modification of the first embodiment. In the modification shown in fig. 7, the opening OP or the light emitting region 109 of the third sub-pixel 300 is larger than the opening OP or the light emitting region 108 of the first sub-pixel 100 and the opening OP or the light emitting region 108 of the second sub-pixel 200. This configuration may be achieved by leaving the third sub-pixel 300 without a separation structure or trench 107. Enlarging the light emitting region 108 can reduce the current density required to obtain a desired luminance, which can help to extend lifetime. With the third sub-pixel 300 having no partition structure or trench 107, the light emitting region 109 of the third sub-pixel 300 is enlarged, and at the same time the light emitting regions 108 of the first sub-pixel 100 and the second sub-pixel 200 can be enlarged. This means that the area ratio of the first sub-pixel 100 and the second sub-pixel 200 increases with respect to the area ratio of the third sub-pixel 300. This enables to extend the lifetime of the first sub-pixel 100, the second sub-pixel 200 and the third sub-pixel 300, thereby extending the lifetime of the light emitting device 1.

Fig. 8 and 9 show a light emitting device according to a comparative example. In the comparative example, the first, second and third sub-pixels 100, 200 and 300 each include a trench 107 or an isolation structure to surround the light emitting region 108. In this configuration, since the light emitting area of the third sub-pixel 300 is limited, the current density required to obtain a desired luminance is large compared to the first embodiment, and thus this is not advantageous in terms of lifetime as the first embodiment.

Second embodiment

The light emitting device 1 according to the second embodiment will be described below. The matters not mentioned in the second embodiment may follow the first embodiment. The second embodiment can be understood as a modification of the first embodiment. Fig. 1 is cited as a sectional view showing a configuration example of a first sub-pixel 100, a second sub-pixel 200, and a third sub-pixel 300 of a light emitting device 1 according to a second embodiment.

Fig. 10 is a plan view showing a configuration example of the first sub-pixel 100, the second sub-pixel 200, the third sub-pixel 300, and the trench 107 in the light emitting device 1 according to the second embodiment. In the second embodiment, the connection groove 107c serving as the connection dividing structure is added to the first embodiment. The connection groove 107c extends to connect the first groove 107a and the second groove 107b. Instead of the grooves 107c, the connection separation structure may be realized by a convex structure or an electrode. The connection trench 107c may be configured not to be connected to any one of the opening OP of the first sub-pixel 100, the opening OP of the second sub-pixel 200, and the opening OP of the third sub-pixel 300. The connection trench 107c may connect the first and second partition structures 107a and 107b to surround the opening OP of the third sub-pixel 300. One third sub-pixel 300 may be at least partially surrounded by a set of a plurality of trenches 107a, a plurality of trenches 107b, and a plurality of trenches 107 c.

When the grooves 107a, 107b, and 107c are provided, leakage current between adjacent sub-pixels (organic light emitting elements) is suppressed, and color mixing between sub-pixels having emission colors different from each other is also suppressed. For example, the leakage current (color mixture) between the first sub-pixel 100 and the third sub-pixel 300 is suppressed by the trench 107a, and the leakage current (color mixture) between the second sub-pixel 200 and the third sub-pixel 300 is suppressed by the trench 107 b. In addition, leakage current (color mixture) between the first subpixel 100 and the second subpixel 200 is suppressed by the grooves 107a and 107 b. Since the three grooves 107a, 107b, and 107c exist between the first sub-pixel 100 and the second sub-pixel 200, leakage current (color mixing) between the first sub-pixel 100 and the second sub-pixel 200 is effectively suppressed. Further, leakage current between the third sub-pixel 300 and sub-pixels disposed around the outside of the third sub-pixel 300 immediately adjacent to the trenches 107a, 107b, and 107c is suppressed by the trenches 107a, 107b, and 107 c.

Fig. 11 to 13 show three modifications of the second embodiment. In the modification shown in fig. 11 and 12, the groove 107a partially surrounds the light emitting region inside thereof, and the groove 107b partially surrounds the light emitting region inside thereof. In the modification shown in fig. 13, the grooves 107a, 107b, and 107c partially surround the light emitting region of the third sub-pixel 300 disposed inside these grooves. In these modifications, the leakage current between the sub-pixels is also suppressed.

Fig. 14 shows another modification of the second embodiment. In another modification shown in fig. 14, the opening OP or the light emitting region 109 of the third sub-pixel 300 is larger than the opening OP or the light emitting region 108 of the first sub-pixel 100 and the opening OP or the light emitting region 108 of the second sub-pixel 200. This configuration may be achieved by leaving the third sub-pixel 300 without a separation structure or trench 107. Enlarging the light emitting region 108 can reduce the current density required to obtain a desired luminance, which can help to extend lifetime. With the third sub-pixel 300 having no partition structure or trench 107, the light emitting region 109 of the third sub-pixel 300 is enlarged, and at the same time the light emitting regions 108 of the first sub-pixel 100 and the second sub-pixel 200 can be enlarged. This means that the area ratio of the first sub-pixel 100 and the second sub-pixel 200 increases with respect to the area ratio of the third sub-pixel 300. This enables to extend the lifetime of the first sub-pixel 100, the second sub-pixel 200 and the third sub-pixel 300, thereby extending the lifetime of the light emitting device 1.

Third embodiment

The light emitting device 1 according to the third embodiment will be described below. The matters not mentioned in the third embodiment may follow the first embodiment or the second embodiment. The third embodiment can be understood as a modification of the first embodiment or the second embodiment. Fig. 15 is a sectional view showing a configuration example of the first sub-pixel 100, the second sub-pixel 200, and the third sub-pixel 300 of the light emitting device 1 according to the third embodiment.

In the third embodiment, the reflection layer 109 is added in the first embodiment or the second embodiment, and the functional layer 103 is replaced with a functional layer 110 including a first light-emitting layer, a charge generation layer 111, and a functional layer 112 including a second light-emitting layer. The light emitting device 1 according to the third embodiment is a tandem type (tandem type) including: a functional layer 110 including a first light emitting layer, a charge generation layer 111, and a functional layer 112 including a second light emitting layer.

The charge generation layer 111 is a layer that generates holes and electrons when a voltage is applied between the lower electrode 102 and the upper electrode 104. The charge generation layer 111 contains a compound that easily accepts electrons from another organic compound. The charge generation layer 111 may be, for example, a combination of an alkali metal and a compound having a lowest unoccupied molecular orbital level of-5.0 eV or less, and may function as a charge generation layer. The alkali metal may be, for example, li, which may be included as part of the metal, compound, or organometallic complex. The compound having a lowest unoccupied molecular orbital level of-5.0 eV or less may be, for example, a hexaazabenzophenanthrene compound (hexaazatriphenylene compound), a shaft-ene compound, or hexafluoroquinone dimethane (hexafluoroquinone dimethane) or the like. However, the compound is not limited to these. If the lowest unoccupied molecular orbital energy level is low to the extent that electrons are extracted from the highest occupied molecular orbital of the alkali metal, then a charge can be generated. Since positive or negative charges are thus generated in the charge generation layer 111, positive or negative charges can be supplied to the layers on the upper and lower sides of the charge generation layer. That is, when an electric field is applied between the lower electrode 102 and the upper electrode 104, carriers are generated in the charge generation layer 111. Carriers are supplied to the functional layer 110 including the first light-emitting layer and the functional layer 112 including the second light-emitting layer, and both can be efficiently emitted.

In the third embodiment, in order to optimize the optical distance between the upper surface of the reflective layer 109 and the light emitting positions of the light emitting layers of the respective colors, the first sub-pixel 100 includes an insulating layer 113, the second sub-pixel 200 includes an insulating layer 114, and the third sub-pixel 300 includes an insulating layer 115. Let Lr be the optical path length from the upper surface of the reflective layer 109 to the light emitting position of the functional layer 110 including the first light emitting layer, and let Φr be the phase shift in the reflective layer 109, we obtain:

Lr ＝ (2m -(Φr/π))x(λ/4) (1)

wherein m is an integer of 0 or more. The optical distances of the insulating layers 113, 114, and 115 are adjusted so that equation (1) is approximately satisfied.

Taking Φs as the phase shift when light having a wavelength λ is reflected by the reflecting surface, the optical distance Ls from the light emitting position to the reflecting surface of the upper electrode 104 approximately satisfies the following equation (2). In this configuration, m' =0.

Ls ＝ (2m'-(Φs/π))x(λ/4)＝ -(Φs/π)x(λ/4) (2)

Thus, the full-layer interference L approximately satisfies the condition given by:

L ＝ Lr + Ls ＝ (2m - Φ/π)x(λ/4) (3)

here, Φ is the sum of phase shifts when light having a wavelength λ is reflected by the reflective layer 109 and the upper electrode 104, that is, Φr+Φs.

The charge generation layer 111 may be shared by a plurality of sub-pixels. However, since the charge generation layer 111 generates charges when an electric field is applied, charges are generated even when an electric field is applied between the sub-pixels. Since the generated charges can reach adjacent pixels via the functional layer which is not divided between the sub-pixels, unexpected light emission may occur.

In the present embodiment, the trench 107 is provided in the insulating layer 106. Accordingly, the charge generation layer 111 on the sidewall of the trench 107 may be formed thinner than the charge generation layer 111 on the flat portion of the insulating layer 106 having a flat upper surface. The charge generation layer 111 has relatively high conductivity. However, when the charge generation layer 111 on the side wall of the trench 107 becomes thin, the resistance may be made high. As a result, leakage current between adjacent sub-pixels (organic light emitting elements) is suppressed, and color mixing between sub-pixels having emission colors different from each other is suppressed.

Fourth embodiment

The light emitting device 1 according to the fourth embodiment will be described below. The matters not mentioned in the fourth embodiment may follow the third embodiment. The fourth embodiment can be understood as a modification of the third embodiment. Fig. 16 is a sectional view showing an example of the first sub-pixel 100, the second sub-pixel 200, and the third sub-pixel 300 of the light emitting device 1 according to the fourth embodiment.

In the fourth embodiment, the color filters 120, 220, and 320 are added to the light emitting device 1 according to the third embodiment. The color filters 120, 220, and 320 are disposed on the planarization layer 116. The color filters 120, 220, and 320 are color filters that transmit light beams of colors (wavelength bands) different from each other. Microlenses 400 may be disposed on each of the color filters 120, 220, and 320. The microlenses may be simply referred to as lenses.

As shown in fig. 17, the radius of curvature of the microlens 401 of the third subpixel 300 may be different from the radii of curvature of the microlenses 400 of the first and second subpixels 100 and 200. The light emitting region 109 of the third sub-pixel 300 may be larger than the light emitting regions 108 of the first sub-pixel 100 and the second sub-pixel 200. When the radius of curvature of the microlens 401 is set to the radius of curvature according to the size of the light emitting region of the third sub-pixel 300, light can be extracted more efficiently.

In addition, in order to match the viewing angle characteristics of the first, second, and third sub-pixels 100, 200, and 300, the radius of curvature of the microlens 401 may be adjusted. This is advantageous in reducing color shift due to the dependence of luminance on viewing angle corresponding to each color. If the light emitting region 109 of the third sub-pixel 300 is larger than the light emitting regions 108 of the first sub-pixel 100 and the second sub-pixel 200, the radius of curvature of the microlens 401 is adjusted accordingly. This can reduce the difference in dependence of luminance on viewing angle and suppress color shift occurring when viewing angle is changed.

Further, the wavelength band of light of the third sub-pixel 300 may be shorter than that of the first sub-pixel 100 or the second sub-pixel 200. Since the lifetime of the light emitting layer having a shorter light emitting wavelength is relatively short, it is possible to suppress the reduction in lifetime by making the light emitting region 109 of the third sub-pixel 300 large.

Fifth embodiment

The light emitting device 1 according to the fifth embodiment will be described below. Matters not mentioned in the fifth embodiment may follow the first to fourth embodiments. The fifth embodiment can be understood as a modification of the first to fourth embodiments. Fig. 18 and 19 are plan views showing configuration examples of the first sub-pixel 100, the second sub-pixel 200, and the third sub-pixel 300 of the light emitting device 1 according to the fifth embodiment.

Fig. 18 shows a Bayer arrangement, and fig. 19 shows a Pentile arrangement. As in the above-described embodiment, the groove 107a may be configured to surround the light emitting region 108 of the first sub-pixel 100, and the groove 107b may be configured to surround the light emitting region 108 of the second sub-pixel 200. In addition, the grooves 107c may be arranged to connect the grooves 107a and 107b and surround the third sub-pixel 300.

[ other constructions in the embodiment ]

[ Structure of organic light-emitting element ]

An organic light-emitting element is formed by disposing an insulating layer, a lower electrode, a functional layer including a light-emitting layer, and an upper electrode on a substrate. A protective layer, a color filter, a microlens, etc. may be provided on the upper electrode. If a color filter is provided, a planarization layer may be provided between the protective layer and the color filter. The planarization layer may be made of acrylic resin or the like. The same applies to the case where a planarization layer is provided between the color filter and the microlens.

[ substrate ]

Quartz, glass, a silicon wafer, resin, metal, or the like can be used as the substrate. Further, a switching element such as a transistor and wiring may be provided over the substrate, and an insulating layer may be provided over the substrate. The insulating layer may be made of any material as long as a contact hole can be formed so that a wiring can be formed between the insulating layer and the first electrode and insulation from unconnected wiring can be ensured. For example, a resin such as polyimide, silicon oxide, silicon nitride, or the like can be used.

[ electrode ]

A pair of electrodes may be used as the electrodes. The pair of electrodes may be an anode and a cathode. When an electric field is applied in the direction in which the organic light emitting element emits light, the electrode having a high potential is an anode, and the other electrode is a cathode. It can also be said that the electrode supplying holes to the light-emitting layer is an anode, and the electrode supplying electrons is a cathode.

It is preferable to use a material having a work function as large as possible as a constituent material of the anode. For example, metals such as gold, platinum, silver, copper, nickel, palladium, cobalt, selenium, vanadium, tungsten, aluminum, or titanium, mixtures containing some of these metals, or alloys obtained by combining some of these metals may be used. Alternatively, a metal oxide such as tin oxide, zinc oxide, indium Tin Oxide (ITO), or zinc indium oxide may be used. In addition, conductive polymers such as polyaniline, polypyrrole, or polythiophene can also be used.

One of these electrode materials may be used alone, or two or more of these electrode materials may also be used in combination. The anode may be formed of a single layer or multiple layers.

When an anode is used as the reflective electrode, for example, chromium, aluminum, silver, titanium, tungsten, molybdenum, an alloy thereof, a stacked layer thereof, or the like can be used. The above material may function as a reflective film having no function as an electrode. When an anode is used as the transparent electrode, an oxide transparent conductive layer made of Indium Tin Oxide (ITO), indium zinc oxide, or the like may be used, but the present invention is not limited to these. The electrodes may be formed using photolithographic techniques.

On the other hand, a material having a smaller work function is preferably used as a constituent material of the cathode. Examples of materials include alkali metals (such as lithium), alkaline earth metals (such as calcium), metals (such as aluminum, titanium, manganese, silver, lead, or chromium), and mixtures containing some of these metals. Alternatively, an alloy obtained by combining these metals may also be used. For example, a magnesium-silver alloy, an aluminum-lithium alloy, an aluminum-magnesium alloy, a silver-copper alloy, a zinc-silver alloy, or the like can be used. Metal oxides such as Indium Tin Oxide (ITO) may also be used. One of these electrode materials may be used alone, or two or more of these electrode materials may also be used in combination. The cathode may have a single-layer structure or a multi-layer structure. Among them, silver is preferably used. In order to suppress aggregation of silver, a silver alloy is more preferably used. The proportion of the alloy is not limited as long as aggregation of silver can be suppressed. For example, the ratio between silver and another metal may be 1:1, 3:1, etc.

The cathode may be a top emission element using an oxide conductive layer made of ITO or the like, or may be a bottom emission element using a reflective electrode made of aluminum (Al) or the like, and is not particularly limited. The method of forming the cathode is not particularly limited, but direct current sputtering or alternating current sputtering is preferably used because good film coverage is provided and resistance is easily reduced.

[ organic Compound layer ]

The organic compound layer may be formed of a single layer or a plurality of layers. If the organic compound layer includes a plurality of layers, these layers may be referred to as a hole injection layer, a hole transport layer, an electron blocking layer, a light emitting layer, a hole blocking layer, an electron transport layer, and an electron injection layer according to functions of the respective layers. The organic compound layer is mainly formed of an organic compound, but may contain an inorganic atom and an inorganic compound. For example, the organic compound layer may contain copper, lithium, magnesium, aluminum, iridium, platinum, molybdenum, zinc, or the like. The organic compound layer may be disposed between the first electrode and the second electrode, and the organic compound layer may be disposed in contact with the first electrode and the second electrode.

Protective layer

A protective layer may be provided on the cathode. For example, by adhering glass provided with a moisture absorbent to the cathode, penetration of water or the like into the organic compound layer can be suppressed, and occurrence of display failure can be suppressed. Further, as another embodiment, a passivation film made of silicon nitride or the like may be provided on the cathode to suppress penetration of water or the like into the organic compound layer. For example, the protective layer may be formed by forming a cathode and transferring it to another chamber without breaking vacuum, and forming a silicon nitride film having a thickness of 2 μm by CVD method. After forming a film using a CVD method, a protective layer may be provided using an atomic deposition method (ALD method). The material of the film formed by the ALD method is not limited, but may be silicon nitride, silicon oxide, aluminum oxide, or the like. A silicon nitride film may be formed by a CVD method on a film formed by an ALD method. The film formed by the ALD method may have a film thickness smaller than that of the film formed by the CVD method. More specifically, the film thickness of the film formed by the ALD method may be 50% or less, or 10% or less of the film thickness of the film formed by the CVD method.

[ color Filter ]

The color filter may be disposed on the protective layer. For example, a color filter considering the size of the organic light emitting element may be provided on another substrate, and the substrate may be combined with the substrate provided with the organic light emitting element. Alternatively, patterning of the color filter may be performed on the protective layer described above using a photolithography technique. The color filter may be formed of a polymer material.

[ planarization layer ]

A planarization layer may be disposed between the color filter and the overcoat layer. The planarization layer is provided to reduce unevenness of the lower layer. The planarizing layer may be referred to as a material resin layer, but is not limited to the use of the layer. The planarization layer may be formed of an organic compound, and may be made of a low molecular material or a polymer material. However, polymeric materials are more preferred.

The planarization layers may be disposed above and below the color filters, and they may use the same or different materials. More specifically, examples of the material include polyvinylcarbazole resins, polycarbonate resins, polyester resins, ABS resins, acrylic resins, polyimide resins, phenolic resins, epoxy resins, silicone resins, and urea resins.

[ microlens ]

The light emitting device may comprise an optical member, such as a micro lens, at the light exit side. The microlenses may be made of acrylic, epoxy, or the like. The purpose of the micro lens may be to increase the amount of light extracted from the light emitting device and to control the direction of the light to be extracted. The microlenses may have a hemispherical shape. If the microlens has a hemispherical shape, there is a tangent line parallel to the insulating layer among tangent lines contacting the hemisphere, and a contact point between the tangent line and the hemisphere is an apex of the microlens. The vertices of the microlenses can be determined in the same manner in any cross-sectional view. That is, in a tangent line of a semicircle contacting the microlens in a sectional view, there is a tangent line parallel to the insulating layer, and a contact point between the tangent line and the semicircle is an apex of the microlens.

In addition, the midpoint of the microlens may also be defined. In the cross section of a microlens, a line segment is imaginary from the end point of one arc to the end point of the other arc, and the midpoint of the line segment may be referred to as the midpoint of the microlens. The cross section for distinguishing the apex and the midpoint may be a cross section perpendicular to the insulating layer.

[ opposite substrate ]

An opposite substrate may be disposed on the planarization layer. The counter substrate is called as a counter substrate because it is provided at a position corresponding to the above-described substrate. The counter substrate may be made of the same material as the substrate. When the substrate is a first substrate, the opposite substrate may be a second substrate.

[ organic layer ]

The functional layer (hole injection layer, hole transport layer, electron blocking layer, light emitting layer, hole blocking layer, electron transport layer, electron injection layer, etc.) including the light emitting layer forming the organic light emitting element according to the embodiment of the present invention is formed by a method described below.

The organic compound layer forming the organic light emitting element according to the embodiment of the present invention may be formed by dry processing using a vacuum deposition method, an ionization deposition method, a sputtering method, a plasma method, or the like. Instead of the dry process, a wet process may also be used in which a layer is formed by dissolving a solute in an appropriate solvent and using a known coating method (e.g., spin coating method, dipping method, casting method, LB method, inkjet method, or the like).

Here, when a layer is formed by a vacuum deposition method, a solution coating method, or the like, crystallization or the like hardly occurs, and excellent stability over time is obtained. Further, when a layer is formed using a coating method, a film may be formed in combination with a suitable adhesive resin.

Examples of the adhesive resin include polyvinylcarbazole resins, polycarbonate resins, polyester resins, ABS resins, acrylic resins, polyimide resins, phenolic resins, epoxy resins, silicone resins, and urea resins. However, the adhesive resin is not limited to these.

One of these binder resins may be used alone as a homopolymer or a copolymer, or two or more of these binder resins may also be used in combination. In addition, additives such as a publicly known plasticizer, an antioxidant, and an ultraviolet absorber may also be used as needed.

[ Pixel Loop ]

The light emitting device may comprise a pixel loop connected to the light emitting element. The pixel loop may be an active matrix loop that independently controls the light emission of the first light emitting element and the second light emitting element. The active matrix loop may be a voltage or current programming loop. The driving circuit includes a pixel circuit for each pixel. The pixel circuit may include a light emitting element, a transistor for controlling light emission luminance of the light emitting element, a transistor for controlling light emission timing, a capacitor for holding a gate voltage of the transistor for controlling light emission luminance, and a transistor for being connected to GND without interfering with the light emitting element.

The light emitting device includes a display area and a peripheral area disposed around the display area. The light emitting device includes a pixel loop in a display area and a display control loop in a peripheral area. The mobility of the transistor forming the pixel loop may be smaller than the mobility of the transistor forming the display control loop.

The slope of the current-voltage characteristic of the transistor forming the pixel loop may be smaller than the slope of the current-voltage characteristic of the transistor forming the display control loop. The slope of the current-voltage characteristic can be measured by a so-called Vg-Ig characteristic.

The transistor forming the pixel loop is a transistor connected to a light emitting element such as a first light emitting element.

The intensity of the driving current can be determined according to the size of the light emitting region. More specifically, when the first light emitting element and the second light emitting element are caused to emit light with the same luminance, a value of current flowing through the first light emitting element may be smaller than a value of current flowing through the second light emitting element. This is because the light emitting area is small, and thus the necessary current can be small.

[ Pixel ]

The light emitting device includes a plurality of pixels. Each pixel comprises sub-pixels emitting light components of different colors. The sub-pixels have emission colors of, for example, R, G and B, respectively.

In each pixel, a region also referred to as a pixel opening emits light. The region is identical to the first region. The pixel opening may have a size of 5 μm (inclusive) to 15 μm (inclusive). More specifically, the pixel opening may have a size of 11 μm, 9.5 μm, 7.4 μm, 6.4 μm, or the like.

The distance between the sub-pixels may be 10 μm or less, and more particularly may be 8 μm, 7.4 μm or 6.4 μm.

The pixels may have a known configuration in plan view. For example, a pixel may have a delta configuration, a pentile configuration, or a Bayer configuration. The shape of each sub-pixel in plan view may be any known shape. For example, hexagons, quadrilaterals such as rectangles or diamonds, etc. are possible. Even if the shape is not completely accurate, a shape close to a rectangle is included in the rectangle. The shape of the sub-pixels and the pixel configuration may be used in combination.

Other embodiments

Fig. 20 is a schematic diagram showing an example of a display device according to the present embodiment. The display device 1000 may include a touch panel 1003, a display panel 1005, a frame 1006, a return pad 1007, and a battery 1008 between an upper cover 1001 and a lower cover 1009. The light emitting device according to the above embodiments may be applied to the display panel 1005. Flexible Printed Circuits (FPCs) 1002 and 1004 are connected to the touch panel 1003 and the display panel 1005, respectively. The transistors are printed on a return board 1007. If the display device is not a portable device, the battery 1008 is not necessary. Even when the display apparatus is a portable device, the battery 1008 can be disposed at another position.

The display device according to the present embodiment may include color filters of red, green, and blue. The red, green and blue color filters may be configured in delta arrays.

The display device according to the present embodiment can also be used for a display unit of a portable terminal. At this time, the display unit may have both a display function and an operation function. Examples of portable terminals are portable telephones such as smartphones, tablet computers, and head mounted displays.

The display device according to the present embodiment can be used for a display unit of an image pickup device including an optical unit having a plurality of lenses and an image sensor for receiving light having passed through the optical unit. The image pickup apparatus may include a display unit for displaying information acquired by the image sensor. In addition, the display unit may be a display unit exposed outside the image pickup apparatus or a display unit disposed in a viewfinder. The image pickup device may be a digital still camera or a digital video camera.

Fig. 21A is a schematic diagram showing an example of an image pickup apparatus according to the present embodiment. The image pickup apparatus 1100 may include a viewfinder 1101, a rear display 1102, an operation unit 1103, and a housing 1104. The light emitting device according to the above embodiments can be applied to the viewfinder 1101. In this case, the display device may display not only an image to be photographed but also environmental information, an image photographing instruction, and the like. Examples of the environmental information include the intensity and direction of external light, the moving speed of the subject, the likelihood that the subject is covered by an obstacle, and the like.

The timing suitable for image capturing is very short, so it is preferable to display information as soon as possible. Therefore, a display device using the organic light-emitting element of the present invention is preferably used. This is because the organic light emitting element has a high response speed. A display device using an organic light emitting element can be more suitable for a device requiring a higher display speed than a liquid crystal display device.

The image pickup apparatus 1100 includes an optical unit (not shown). The optical unit includes a plurality of lenses, and forms an image on the image sensor accommodated in the housing 1104. The focal point of the plurality of lenses may be adjusted by adjusting the relative positions. This operation may also be performed automatically. The image pickup device may be referred to as a photoelectric conversion device. In addition to sequential photographing, the photoelectric conversion apparatus may employ, as an image pickup method, a method of detecting a difference from a previous image, a method of extracting an image from an image that is always recorded, or the like.

Fig. 21B is a schematic diagram showing an example of an electronic device according to the present embodiment. The electronic apparatus 1200 includes a display unit 1201, an operation unit 1202, and a housing 1203. The light emitting device according to each of the above embodiments may be applied to the display unit 1201. The housing 1203 may house a circuit, a printed board including the circuit, a battery, and a communication unit. The operation unit 1202 may be a button or a touch panel type reaction unit. The operation unit may also be a biometric authentication unit that performs unlocking or the like by authenticating a fingerprint. An electronic device comprising a communication unit may also be regarded as a communication device. The electronic device may also have a camera function by including a lens and an image sensor. An image photographed by the camera function is displayed on the display unit. Examples of electronic devices are smartphones and notebook computers.

Fig. 22A and 22B are schematic diagrams showing an example of a display device according to the present embodiment. Fig. 22A shows a display device such as a television monitor or a PC monitor. The display device 1300 includes a frame 1301 and a display unit 1302. The light emitting device according to the above embodiments may be applied to the display unit 1302.

The display device 1300 includes a support frame 1301 and a base 1303 of a display unit 1302. The base 1303 is not limited to the form shown in fig. 22A. The underside of frame 1301 may also function as a base.

In addition, the frame 1301 and the display unit 1302 may be curved. The radius of curvature may be 5000mm (inclusive) to 6000mm (inclusive).

Fig. 22B is a schematic diagram showing another example of the display device according to the present embodiment. The display device 1310 shown in fig. 22B is configured to be foldable, i.e., the display device 1310 is a so-called foldable display device. The display device 1310 includes a first display unit 1311, a second display unit 1312, a housing 1313, and a flex point 1314. The light emitting device according to the present embodiment may be applied to each of the first display unit 1311 and the second display unit 1312. The first display unit 1311 and the second display unit 1312 may also be one seamless display device. The first display unit 1311 and the second display unit 1312 may be divided by a bending point. The first display unit 1311 and the second display unit 1312 may display different images, or may display one image together.

Fig. 23A is a schematic diagram showing an example of the lighting device according to the present embodiment. The lighting device 1400 may include a housing 1401, a light source 1402, a circuit board 1403, an optical film 1404, and a light diffusing unit 1405. The light emitting device according to the above embodiments may be applied to the light source 1402. The optical film may be a filter that improves the color rendering of the light source. The light diffusing unit can project light of the light source to a wide range by effectively diffusing the light when lighting or the like is performed. The optical film and the light diffusion unit may be disposed at an illumination light exit side. The lighting device may further comprise a cover at the outermost portion, as required.

The lighting device is, for example, a device for indoor lighting. The lighting device may emit light of any color, such as white light or diurnal white light. The lighting device may further comprise a light control loop for controlling these light components. The lighting device may further comprise an organic light emitting element according to the present invention and a power supply loop connected to the organic light emitting element. The power supply loop is a loop for converting an AC voltage to a DC voltage. The color temperature of white is 4200K, and the color temperature of diurnal white is 5000K. The lighting device may further comprise a color filter.

In addition, the lighting device according to the present embodiment may include a heat dissipation unit. The heat dissipating unit dissipates heat inside the device to the outside of the device, and examples of the heat dissipating unit are liquid silicon and metals having a high specific heat.

Fig. 23B is a schematic view of an automobile as an example of a moving body according to the present embodiment. An automobile has a tail lamp as an example of a lighting fixture. The automobile 1500 has a tail lamp 1501, and may have a form of lighting the tail lamp when a braking operation or the like is performed.

The light emitting device according to each of the above embodiments can be applied to the tail lamp 1501. The tail lamp may include a protection member for protecting the organic EL element. The material of the protective member is not limited as long as the material is a transparent material having a certain strength, and is preferably polycarbonate. The polycarbonate may be mixed with a furan dicarboxylic acid derivative, an acrylonitrile derivative, or the like.

The automobile 1500 may include a body 1503 and a window 1502 attached to the body 1503. The window may be a window for checking the front and rear of a car and may also be a transparent display. The transparent display may include an organic light emitting element according to the present embodiment. In this case, the constituent material of the electrode or the like of the organic light-emitting element is preferably formed of a transparent member.

The mobile body according to the present embodiment may be a ship, an airplane, an unmanned aerial vehicle, or the like. The moving body may include a main body and a lighting fixture provided on the main body. The lighting fixture may emit light for informing the subject of the position. The lighting fixture includes the organic light emitting element according to the present embodiment.

An application example of the display device according to each of the above-described embodiments will be described with reference to fig. 24A and 24B. The display device may be applied to a system that may be worn as a wearable device such as a smart glasses, HMD, or smart contact lens, etc. The image pickup display apparatus used in such an application example includes an image pickup apparatus capable of photoelectrically converting visible light and a display apparatus capable of emitting visible light.

Glasses 1600 (smart glasses) according to an application example will be described with reference to fig. 24A. An imaging device 1602 such as a CMOS sensor or SPAD is provided on the surface side of the lens 1601 of the glasses 1600. The display device according to each of the above embodiments is provided on the rear surface side of the lens 1601.

The glasses 1600 may also include a control 1603. The control device 1603 functions as a power source for supplying electric power to the image pickup device 1602 and the display device according to each embodiment. In addition, the control device 1603 controls the operations of the image pickup device 1602 and the display device. An optical system configured to collect light to the image pickup device 1602 is formed on the lens 1601.

Glasses 1610 (smart glasses) according to an application example will be described with reference to fig. 24B. The glasses 1610 include a control device 1612, and an image pickup device and a display device corresponding to the image pickup device 1602 are mounted on the control device 1612. An image pickup device in the control device 1612 and an optical system configured to project light emitted from the display device are formed in the lens 1611, and an image is projected to the lens 1611. The control device 1612 functions as a power source that supplies power to the image pickup device and the display device, and controls the operations of the image pickup device and the display device. The control device may include a line of sight detection unit that detects a line of sight of the wearer. The line of sight detection may be accomplished using infrared light. The infrared light emitting unit emits infrared rays to eyeballs of a user who looks at the displayed image. An image pickup unit including a light receiving element detects reflected light of emitted infrared rays reflected from an eyeball, thereby obtaining a photographed image of the eyeball. The light reduction unit is provided for reducing light from the infrared light emitting unit to the display unit in a plan view, thereby reducing degradation of image quality.

A line of sight of a user to a displayed image is detected from a photographed image of an eyeball obtained by photographing infrared rays. Any known method may be applied to line-of-sight detection of a captured image using an eyeball. As an example, a line-of-sight detection method based on Purkinje images obtained by cornea reflection of irradiation light may be used.

More specifically, the line-of-sight detection process is performed based on pupil center cornea reflection. Using pupil center cornea reflection, a line-of-sight vector representing the direction (rotation angle) of the eyeball is calculated based on the pupil image and Purkinje image included in the photographed image of the eyeball, thereby detecting the line of sight of the user.

The display device according to the embodiment of the invention may include an image pickup device including a light receiving element, and may control an image displayed on the display device based on line-of-sight information from a user of the image pickup device.

More specifically, the display device determines a first visual field area in which the user is looking and a second visual field area other than the first visual field area based on the line-of-sight information. The first and second field of view regions may be determined by a control device of the display device, or the first and second field of view regions determined by an external control device may be received. In the display region of the display device, the display resolution of the first field of view region may be controlled to be higher than the display resolution of the second field of view region. That is, the resolution of the second field of view region may be lower than the resolution of the first field of view region.

In addition, the display area includes a first display area and a second display area different from the first display area, and a higher priority area is determined from among the first display area and the second display area based on the line-of-sight information. The first display area and the second display area may be determined by a control device of the display device, or the first display area and the second display area determined by an external control device may be received. The resolution of the higher priority region may be controlled to be higher than that of the region other than the higher priority region. That is, the resolution of the region of relatively low priority may be low.

Note that the first field of view region or the higher priority region may be determined using AI. The AI may be a model configured to perform the following functions: the angle of the line of sight and the distance of the object in front of the line of sight from the image of the eyeball are estimated using the image of the eyeball and the actual observation direction of the eyeball in the image as the supervision data. The AI program may be held by a display device, an image pickup device, or an external device. If the external device holds the AI program, it is delivered to the display device via communication.

When performing the line-of-sight detection-based display control, it is preferable to apply smart glasses further including an image pickup device that can be configured to photograph the outside. The intelligent glasses can display the shot external information in real time.

As described above, when the light emitting device according to the present embodiment is used, display with high image quality can be stably performed even when used for a long period of time.

While the invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. The scope of the following claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions.

Claims

1. A light emitting device includes a plurality of sub-pixels including a first sub-pixel, a second sub-pixel, and a third sub-pixel, one of the first sub-pixel, the second sub-pixel, and the third sub-pixel being adjacent to the other two sub-pixels,

wherein each of the plurality of subpixels comprises: a lower electrode; a bank including an opening exposing a central portion of the lower electrode; an organic compound layer configured to cover the lower electrode and the bank and including a light emitting layer; and an upper electrode disposed on the organic compound layer;

the bank of the first subpixel includes a first partition structure at least partially surrounding the opening disposed on the lower electrode of the first subpixel, and

The bank of the third sub-pixel does not include a separation structure configured to surround the opening of the third sub-pixel.

2. The light emitting device of claim 1, wherein the bank of the second sub-pixel comprises a second separation structure at least partially surrounding the opening disposed on the lower electrode of the second sub-pixel.

3. The light emitting device of claim 1, wherein the opening of the third subpixel is larger than the opening of the first subpixel and the opening of the second subpixel.

4. The light emitting apparatus of claim 2 wherein,

the first separation structure is arranged on the lower electrode of the first sub-pixel, and

the second separation structure is disposed on the lower electrode of the second subpixel.

5. The light emitting device of claim 2, wherein the first and second separation structures comprise portions disposed between the first and second sub-pixels.

6. The light emitting device of claim 1, wherein the bank of the third sub-pixel is configured to be spaced apart from the bank of the first sub-pixel and the bank of the second sub-pixel.

7. The light emitting device of claim 1, wherein the bank of the third sub-pixel does not include a separation structure configured to surround the third sub-pixel between the opening of the third sub-pixel and another sub-pixel adjacent to the third sub-pixel and configured to surround the third sub-pixel.

8. The light emitting device of claim 1, wherein the first separation structure surrounds an entire perimeter of the opening of the first subpixel.

9. The light emitting device of claim 1, wherein the first separation structure partially surrounds the opening of the first subpixel.

10. The light emitting device of claim 2, further comprising a connection separation structure extending to connect the first separation structure and the second separation structure.

11. The light-emitting device according to claim 10, wherein the connection separation structure is not connected to any one of the opening of the first sub-pixel, the opening of the second sub-pixel, and the opening of the third sub-pixel.

12. The light emitting device of claim 10, wherein the connection separation structure connects the first separation structure and the second separation structure to surround the opening of the third sub-pixel.

13. The light-emitting device according to claim 1, wherein the organic compound layer comprises a plurality of light-emitting layers and a charge generation layer arranged between the plurality of light-emitting layers.

14. The light emitting apparatus of claim 2 wherein,

the first sub-pixel, the second sub-pixel and the third sub-pixel each comprise a lens,

in the first sub-pixel, the first partition structure is arranged between the lens and the lower electrode, and

in the second subpixel, the second separation structure is disposed between the lens and the lower electrode.

15. The light emitting device of claim 14, wherein a radius of curvature of the lens of the third sub-pixel is different from a radius of curvature of at least one of the lens of the first sub-pixel and the lens of the second sub-pixel.

16. The light emitting device of any one of claims 1 to 15, wherein the wavelength of light generated by the third sub-pixel is shorter than the wavelength of light generated by the first sub-pixel.

17. A display apparatus comprising a light emitting device as defined in any one of claims 1 to 16.

18. A photoelectric conversion device, comprising an optical unit, the optical unit comprising: a plurality of lenses; an image sensor configured to receive light that has passed through the optical unit; and a display unit configured to display an image photographed by the image sensor,

Wherein the display unit comprises a light emitting device as defined in any one of claims 1 to 16.

19. An electronic device, comprising:

a display unit comprising a light emitting device as defined in any one of claims 1 to 16;

a housing provided with the display unit; and

and a communication unit provided in the housing and configured to perform communication with the outside.

20. A lighting device, comprising:

a light source comprising a light emitting device as defined in any one of claims 1 to 16; and

a light diffusing unit or an optical film configured to transmit light generated by the light source.

21. A mobile body, comprising:

a lighting fixture comprising a light emitting device as defined in any one of claims 1 to 16; and

a main body provided with the lighting fixture.